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Messenger interfaceHave anyone photos, schematic, rom images, documentation, or software for Messenger interface ? [url]http://www.worldofspectrum.org/infoseekid.cgi?i…
... I go to USR0 mode or to 48 basic, then return from NMI ... br /> JP PE, L_004E ;jump to return to ZX rom code POP AF ...
JP L_0050 ;jump to return to ZX rom code RET
registers and wait for midi communication ... -
Tutorial - learn machine code in 30mins[B][I]Message from the moderators[/I] - bigjon has requested that readers' attention be drawn to a better version of this tutorial, one which is easi…
... that needs to be done before returning to BASIC
;return score to BASIC
Copy ... temporary byte-sized addresses called 'registers'.
The first register deals ... ;add adds the registers together, so hl points to the right hand ... -
Can a guy that traveled on the short bus learn machine code...Hmmm So after some soul searching I figured it was time to finaly nail spectrum machine code. Its so frustrating to sit infront of a basic listing w…
... good practice to make sure that the registers are set to the initial ... 1 we should get a return value of 1..*
*fingers ... be nice.
Registers appear to be circular when using INC ... school who actualy programmed in BASIC all the rest were the ... -
Dock's ZX Maze gameI'm hoping to finish a simple maze game in ZX Spectrum BASIC this week, as part of the Ludumdare Retro challenge. I used to dabble in speccy basic on…
... -- asm programmers, C compilers, Boriel basic, ...
As an ... it, other than the registers used to pass return value ([de]hl) ... which also happens to be ... would individually be passed through to following stages, etc. The ... -
Graphics program in AssemblyHi so I think I'm getting the hang of this so I've done this program. It writes directly to the screen. I'm using ZX Spin. [code] LD HL,16384 LD B,…
... have no intention of returning to BASIC.
(3) CALLs ... put the address they will RETurn to onto the stack as well ... you RET, or it'll return to the wrong place.
... are actually quicker than writing registers to memory, so some programmers ... -
AY musicThis is a format I'm proposing for an AY music player. If anyone can see any problems or anywhere it can be improved please say so. An AY music form…
... /> F End Stream - 000-7FF return to stream position, 1bit on, all ... Will only work if programmed to be synchronised between channels.
to allow for multiple sized instruments ... is intended. As the basic structure doesn't change it ... -
Basic listings memory occupationI remember readong someplace that due to basic's representation of number, in a program, in order to save space, it was better to represent integers …
... remember readong someplace that due to basic's representation of number, in ... a program, in order to save space, it was better ... to represent integers by stuff like:< ... -
Vote Spectrum! (One last time)I've written my last article for the Micro-mart computer world cup competition. This time - as I think you all already know - it's the FINAL against…
... Computer Mart forum (go to [url="http://www.micromart. ... today 's standards, the basic A500 can still pack a ... 's still the Spectrum I return to.
I loved ... , the best in-built BASIC I've ever used; ... that made computing accessible to so many for the ... -
BASin Release 6 available for DownloadHi all - It's another cut'n'paste from CSS :) I've been tapping away again, and seeing as a couple of people have recently seen BASin's latest bits…
... .
Edit BASIC programs, using text-processing tools ... add watches containing any BASIC expression you choose and Single ... can be any Speccy BASIC expression (including such stuff ... each error, and options to return to the program editor or execute ... -
Deduggers in emulatorsI've used several emulators with build-in debuggers, and now I want to share my opinion. Debugger in Spectaculator 6.0 is great! The interface is nic…
... also great. Navigation arrows allow to return to previous location, very usefull. ... I like information about Z80 registers and flags. But it ... you must use scrollbar to get to some memory location. "run ... ! "Hardware info" allows to see which 128k memory pages ... -
Zaf-forth to Z80 compiler Build 5This forth like complier is changing almost every day with new items been added. Here is a new Zaf-forth word add it the sptword.fth file - which is…
...
;"Start label used to jump back to start"
... spaces
;"prints 8 spaces to screen"
."Random ... cr
;"print a carrige return to screen"
6 spaces ...
jump start
;"jump to start label"
halt ... -
How to use rollback in RZX file?A beginner question: I want to record my game action to RZX file. I know it is possible to "save" game during recording and if something goes wrong…
... />
I want to record my game action to RZX file.
return to this state. This is called ... do rollback? I am eager to make some games walkthrough -
Programming MC : first stepsIsn't nice to collect all kinds of short routines to help making the first steps into MC for everyone who never touched MC? What I mean is mostly th…
... to BASIC
random push hl ; save registers
push bc ; save registers ...
ld c,a ; marge to C
dec ... -
ANN - ZXSoftware.co.uk Update V1.5 21/05/06ZXSoftware has now been updated to V1.5. Changes :- 299 new titles have been added - Listed below. A few thousend new ingame screenshots and loadin…
... br /> Mines of Saturn + Return to Earth Mikro-Gen Ltd
Spectrum Basic Programming Course - Revised Edition ... Editoriale Jackson
Video Basic Issue 02 Gruppo Editoriale ... Jackson
Video Basic Issue 03 Gruppo Editoriale ... -
ANNOUNCE: Jet Set Willy: Party Willy [Special Edition 2007]Today (23rd April) is the third anniversary of the full release of [i]Party Willy[/i], Daniela Hantuchov?'s 24th birthday, Nicole Vaidi?ov?'s 18th bi…
... It is long overdue to return to the art and craft of ... font]
[49] "The Return of the Brothers Grimm": I ... to laterally invert the toilet-run.
[/list]
Hence the BASIC ... loader no longer applies the post-edits to "tsaE ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... setting the registers. Now, if I'm going to load several ... understand that I have to use certain registers if I call a ... don't understand why certain registers have to be used for something ... still see registers as BASIC variables, and I want to change that.< ... -
Multiple ROMsI'm mulling over the idea of a bit of hardware with a ROM in it, which has some commands that can be called by BASIC (like the old wafadrive star com…
... I presume how adding commands to BASIC works is that the ... control to the Speccy's internal ROM, restores all pertinent registers ... and stack, and sets the program counter back to ... filesystem ROMs that hooks into BASIC this way, if you ... -
WANTED - Return to Ithaca AdventureI have been contacted by the son of the author of this program - does anyone have an original I could pass onto the son? It was published by Atlanti…
... Software - I have pointed him to the download on the archive ... -
Breakpoints and other questionsSome games have LDIRs, LDDRs, ANDs and XORs before they jump to the real start address (and some other stuff that I don't understand yet). If I want …
... is to create TZX files of unprotected games containing a Basic loader ... copies 1704 bytes from 16398 to 23296, where the code originally ... was, and jumps to the start address.
... think I've heard some registers have to have certain values for ... -
Myth II - Return to HellHello all. A new game has been released... a sequel to one of the best ZX games ever. It is of russian make (I THINK) but I think you can get around…
... has been released... a sequel to one of the best ZX ... -2.zip[/url]
To start, choose Pentagon 128, then ... in the menu go to 48k Mode and write RANDOMIZE ... menu appears use Shift + arrows to navigate and run MYTH2.B ... -
So you want to make a cardgame......but you haven't got a good deck to display. Well here is a fully relocatable routine that will do the job for you. Place the code anywhere in me…
... 40000 ; and DUMP 4e4 to prove relocatable
to PRAT
LD ...
RET ; back to BASIC
prat ... -
Desperately need help with .TAP file bug (probably a wrong value error)I'm trying to create a .tap file with Java and have been following the specification at [url]http://www.zxmodules.de/fileformats/tapformat.html[/url…
... /> ByteBuffer dataDataBlock = ByteBuffer.allocate(2+basic.length);
dataDataBlock.order(ByteOrder ... ] = b;
counter++;
}
return to;
}
public void ... -
FLASH EPROM programming on ZXExist any other software for rewriting FLASH EPROM or EEPROM chips on real ZX ? I know only: EEPROM flasher for original DivIDE [url]http://85.132.…
... l_5ce2: dec hl ; writing to RAM3 and EEPROM
... hl), a ; write byte to target adress(eeprom/ram3)
ld c, h ; return BC value to basic
ret ;
... -
Z80 'EXX' ConfusionI was working on a little Z80 routine last evening, and, having run out of registers, resorted to sticking one of the values into a memory location a…
... run out of registers, resorted to sticking one of the ... to do, but I was getting a 'Nonsense in BASIC' ... />
I returned to my problem this morning, and ... decided to write some minimal bit ... code gives a 'Nonsense in BASIC' error!
... -
Joffa speaks... sort of.I was looking through my archives today to search for some images, and found this psydo-interview I done with a certain Jonathan Smith. It reads as f…
... looking through my archives today to search for some images, and ... Ocean software, is about to make a return to the 8-bit world ... from the usual messing with BASIC, I started developing games in ... ?It took about four months to produce this sports simulation, in ... -
designing a computerHi everyone! I am designing a 4 bit computer and i need some advice, is this a good instruction set? [CODE] BINARY OPCODE DESCRIPTION 00000 nop…
... /> 00001 add add register n to a
00010 sub subtract ... reg
01001 jump jump to address nm
01010 compare ... jump to nm and note the return line
10010 ret return
there are 16 registers, 0 to F
if the description ...
